The work is executed in the page through browser workers, WebAssembly, Web Audio, or WebGPU as stated.
V2I / AVAILABLE NOW
Voice to Instrument
Turn a sung line into notes. Track a monophonic voice, quantize its notes, and render piano, guitar, strings, or synth locally.
V2I / local workbenchYIN pitch tracking and local synthesis
Detected notes appear here.
GUIDE / voice to instrument
What does voice to instrument do?
Voice to instrument conversion begins by estimating one fundamental frequency at a time. SoundTools uses YIN frames, joins stable neighboring pitches into note events, quantizes them to a selected key and scale, and synthesizes a new instrument line while also creating a standard MIDI sequence.
RELATED USES
- turn voice into instrument
- singing to MIDI
- hum to piano
- voice melody converter
FIELD NOTES / 01
A real local processor, not a decorative upload box
YIN pitch tracking + note segmentation + local synthesis runs after you choose a source and explicitly start the operation. The audio samples remain in browser memory; SoundTools does not send the selected media to an application endpoint.
Use a dry monophonic recording, select key and major, minor, or pentatonic scale, choose one of four synthesized instruments, and set BPM for MIDI timing. Results remain available for preview and download only in the current tab. Closing or refreshing the page releases those temporary objects.
PROCESS / THREE STEPS
How to use voice to instrument
- 01
Choose the local source
Open a compatible file in the dedicated workbench at the top of this page. The browser validates and decodes it without an upload step.
- 02
Set the useful controls
Use a dry monophonic recording, select key and major, minor, or pentatonic scale, choose one of four synthesized instruments, and set BPM for MIDI timing.
- 03
Process, check, and export
Run the local processor, inspect the status and preview, then save Instrument WAV · MIDI when the result is ready.
SIGNAL NOTES / VERIFIED BEHAVIOR
What this tool actually does
Clear limits are part of a useful tool. These values describe the processor currently running in this page.
Runtime and model assets may be downloaded, but the selected file is not attached to those requests.
The dedicated workbench exposes only formats it can actually produce in the current browser.
USE CASES / 02
Useful reasons to open voice to instrument
- Hum an idea
Turn a melodic sketch into editable MIDI and a quick audio reference.
- Ear-training check
See which quantized notes a clear solo line produces.
- Arrangement starter
Render a rough piano, guitar, string, or synth version before detailed production.
QUESTIONS / PRACTICAL ANSWERS
Questions about this tool
Answers based on the current browser processor—not promises about a future version.
01Is my audio uploaded for processing?
No. Audio samples stay in browser memory. The page may download a codec or model asset, but it does not send the selected file with that request.
02Why can the first run take longer?
This tool uses YIN pitch tracking + note segmentation + local synthesis. A browser may need to download and initialize that runtime before the first operation; later runs can reuse cached assets.
03Can I preview the result before saving?
Yes. Audio-producing tools expose local result players, while analysis and transcription tools show their detected data before download.
04What happens when the browser is unsupported?
The workbench reports the missing capability instead of uploading the media or pretending that processing is still running.
05Do I need an account or install?
No. The tool opens directly in a compatible browser, requires no SoundTools account, and creates its temporary working state on the current device.
06Can this convert chords or a full mix?
No. It is designed for one dominant sung, hummed, or whistled pitch at a time.
07Can I edit the result in a DAW?
Yes. Download the MIDI to change notes, timing, velocity, and instrument in compatible music software.